Some peeps have suggested that the live tests have been faked because (I presume) it sounds so 'clean'. This isn't the case - it really IS all live audio. There are two reasons it sounds so 'clean', the first being that the recordings were done outside, where there is minimal echo. This is particularly noticeable in the field test, which is to be expected as it's a field - there really is nothing for the sound to bounce off. The second reason it's so clean is that all the live audio was captured with TWO Rode NT1-A studio mics in an ORTF stereo config (carried by someone off camera). This config was chosen because I needed the high SPL capability to avoid distortion. These mics are also cardioid mics, which means they reject off-axis sounds (like echos) which also contributed to the 'clean' sound. Hope this helps to clarify things! :)
+DIY Perks do you know of a amplifier version with a sort of audio remote, I would like to build something like this for my tv in my den. I know this has a audio in , but my tv is weird where once audio is outputted it decides the amplifier of the speakers is in charge of volume control. thanks for help.
The amp came in the mail two days ago! Works great! I just used an ac power adapter to power it for now and used an altoids can to hold it, for now haha. It's really cool.
+hyperman717 As far as i am aware electronics don't mind what amps come out of the adapter, its more the voltage. The specs say this amp can do 8-24v and the device will use the amps it needs, so long as you don't plug it to a 120v 15a wall outlet and stay within 8-24v dc you will be fine lol. Just find a 8-24v ac to dc power supply you got lying around, should power it assuming it has enough of a max amperage output. but if your dc power supply doesn't have sufficient amps it might not power on, or it wont preform optimally. examples of some ac to dc power supply's are, old laptop power adapters, phone charger bricks, the xbox360/one power brick. if you want to find out its output look on the sticker you should see something like this. AC in 160v-240v ~ 50/60hz DC OUT 5v === 500mA
+DIY Perks Just got mine in the mail today. Super happy with it, and it sounds great! Gonna try using it for a portable-speaker-backpack project Im working on. Thanks for jet a brilliant video. Keep up the good work. :)
This is two years late saying as I just have watched the video, but I can confirm that he isn't lying about the audio. Having watched his portable mic build before this I know he has the audio gear to record at a level that is going to be higher quality then what most peoples headsets and or speakers can reproduce, an added bonus to my claim is I have recreated this genius device and tested it, and it really does work. Keep up the amazing work +DIY Perks
Kipkay minus the sponsors every 3 gosh dang seconds and total rip off of other people. I applaud you for making truly original designs, especially for sun light.
MrTrollicus I know it's a simple project, but the quality of the video is outstanding, the lighting, the audio and the b roll footage is pretty damn neat for a solo video producer.
Found out about this amplifier thanks to you. I used acrylic glass and a nice copper plate as a logo instead of the aluminium, and I'm powering it via a universal laptop charger. Used it for my wedding first and now it's got a permanent place in the garage workshop! I absolutely love it, thank you for sharing this.
you should post a video of your results on ure channel. i would love it if you pointed out some of the details missed in this vid. ive seen comments about the BT pairing noise being at full volume and that it can damage your speaker setup. any issues there?
Hey, can you tell me if i can recycle my old hometheatre passive speakers (2x 6ohm towers +2x 4ohm subwoofer) with a car amplifier fed by a computer PSU?. Let's assume the wattage output, impedance and power supply do meet the required specifications, do i have to take care of something else? (The speakers and subwoofers have the +/- spring cables on the back).
DIY Perks how would you go about adding a separate volume control to the circuit? I want to turn it down independent to the Bluetooth/phone volume as the lowest settings is too loud. Thanks
nothing fake about this. this is the amplifier that I was hoping to replace with one that somebody said how to "make" but this is a premade store-bought amplifier not a home made amp. it's a neat project. and a nice way to mobilize an amp and a nice way to enclose an amp.
Funny I'm watching this 7 yrs later and the quality of your work has improved immeasurably. It's insane how smaller and probably better you could make this now. Please please do pdf parts lists with all your projects please. Oh any chance of doing a triple monitor display to act with a tablet or computer?
I built this the year this video came out. As a direct response to the popularity of this video, chinese ebayers started making custom boxes that came with the Amp made out of Acrylic and an all in one 10 battery tray. This meant all you had to buy besides that one purchase was some velcro strips to adhere it to the speakers. All in all it cost be about £25, including the 10 rechargeable Amazon basic's batteries. I could play music at a very decent volume for 7hrs or so off of one charge. I've used it for many BBQ's, what a great build this is.
With no heatsink attached, I highly doubt that amplifier chip is actually rated at 50 watts RMS per channel... maybe 50 watts maximum (peak) for both channels combined, which would probably come out to about 10 to 15 watts RMS per channel. However, with efficient speakers, that's still plenty of power for it to get very loud!
+Vishalkrishna Tr A 10% Total Harmonic Distortion is terrible for any Hi Fidelity (or even mainstream) audio experience, considering that even 1% is too much to begin with; but I guess that for a backyard party DIY project for the non-electronic engineers or hobbyists this might do.
Just look up D-amps or T-amps. They are freakin efficient. 96+% sort of efficient. No trouble putting out these wattages. To filter it to acceptable THD levels is quite a challenge tough. But not unsurmountable. T-amps are a proof.
+NGC1433 Up to 10W THD below 0.1% and only goes over 0.25 after 20W where it rises sharply. These modern chips are magic. They were not cheating with specs at all.
vwestlife Also thought that so went and checked it out. The seller says 50W+50W but it's the little P on the end that makes the difference. The TDA7492 has 50+50 RMS but this one is 25+25 RMS. Yes, it's at 10% specs but the 20W @ 0,25% is more than enought to get a pretty loud sound for a small party :) My doubt is the battery life. Dont think they would last for long at full power...
The battery-life is easy to get: 10 AA with 1.5 V each => 15 Volts. Continues power ~ 30 W total (easier number). So you are drawing 2 Amps. And good batteries are at around 2 mAh. So 1h with rather high volume would seem possible. And the sound-quality is good too, with < 1% for most of its range is far better than what typical loudspeakers produce, so not noticeable.
"The valve rectified, transformer coupled, single ended pure Class-A 211 amp and 64' folded horn driver combo is the must have party / picnic system for the young hipster this summer"
Hey DIYPerks! I just got my final parts today so i could build it myself, and god damn it sounds INSANE!! Can't believe the sound is really THAT clear and it's alot better in stereo!
Can't really say dude. I've bought 10 cheap AA batteries and it has been playing non stop for 2 hours in one session and it still hasn't run dry! But you can hook it up to a car battery since it can supply 12v/24v and the board supports that, so you can probably make it play all day long! ;-)
It's really hard to be impressed by something on the internet these days... but you sir!! you blew my away!! Your DIYs are off the charts cool! Keep it up man!!
I ordered one and i have to say, it's a really nice little board. One thing to be aware of, they don't seem to have a power button and auxiliary jack anymore. At least mine doesn't.
Bryan Peeters you'd have to cut the power to the board. Either by pulling the little plug, removing a battery or installing a switch between the battery and the board.
Pal you are an inspiration , creative and actually talented youtuber, the type to go on and do great things, haters get pitty still commenting ignorance 10 years down the line... Keeps up the productions and tutorials,,,, well apreciated
I saw this and recognized the amp right away, love that board, i have it run my desk setup and my old car that was missing a radio. I use lipo connectors so i can move it around with me.
When played loud those batteries will run out very quickly. My guess would be less than half an hour. Because of the higher voltage it will play louder when Alkaline batteries are used instead of rechargeable ones. My advice would be to use four or five good quality Li-Ion 18650 rechargeable batteries* in series, but still the playing time will not be very long. Since those speakers aren't really portable you can use a notebook power supply (15-21 Volts) instead of batteries and run them from the mains. * to be safe, use protected Li-Ion batteries from a trusted source (so NOT China).
That was my thought about the batterys I'm just curious to what the batterys are actually doing bc it's not powering the speaker, is it just powering that amplifier then? And since they arnt portable is there a way to hard wire this things so I can plug in to a wall or a surge so nothing gets screwed up?
Hi can i get help. I would like to set a portable bluetooth speaker with same but 25w+25w speaker. C Please help me to choose the speaker.. Which one should I go for ?? I need a louder and crisp combination
Dangit, I just built something like this (although, more of a boom box style) with the same amp but no bluetooth fro $15. Oh well, at least mine has a UPS battery powering it with about 3 -5 days of battery life.
Getting the controls would be difficult though, as I made the cabinet for all analog controls, and the main control panel is full, and the rest of the case is 3/4" maple.
Most common question in the comments section: "How long will the batteries last?" Audio amplifiers don't have a constant consumption rate. Also the volume level affects the battery life. And lastly, another reason why this question cannot be answered directly is that, the capacity of the batteries that you use will affect the battery life.
Wow this thing puts to shame all those ludicrously over priced bluetooth speakers floating around. I mean sure this is a little bulkier but if you want a bluetooth speaker for a work site or something this is fine and 10x louder.
yes but you must have individual cell protection! Li- xx cells are very sensitive to overcharge and over-discharge. (2.9 volt to 4.1 volt exactly -/+ 0.1 or even less volt tolerance only.
I run it off 10 AA rechargeables and it lasts for about 2 days straight from a full charge (say if you forget to turn it off). If you only turn it on for a couple hours each day (which I do) it has lasted me up to 2 weeks of stereo fun! Hope my reply helps!
+OSCAR CAMPO keep in mind having it on for 2 days consumes likes no power compared to have it blasting music full power for 2 days straight. It probably won't last long doing that.
Yeah, you're probably right. But, in my experience, even having at full blast I've gotten at least a whole day of play time out of it. It's incredible how long it can play for in my opinion. Thanks for the comment.
I always hoped for a life like him. So charming so intelligent so helpful so smart and most importantly a very good Samaritan ....praises are nothing in front of him.
Can you use a 4x18650 battery pack Doing this should mean a shorter amp design, you will just need to have a charging circuit which is easy to find on ebay
I'm planning on doing this build but instead of the batteries used here, I have decided to opt for 6 X 3.7V lithium polymer 18650 batteries adding to a total of 22.2V. I have decided to choose this option because I will be able to set the gain mode to a higher decibel level, plus I will hook up the battery packs using deans connectors, so I can easily plug those into my smart charger. I just want to know.. Is there any particular reason I shouldn't go with lithium ion batteries, or at such a high voltage? Thanks for your time.
Also, I'd love to know what that track was you used to demonstrate the rig. I've put mine together now and it sounds great on a pair of Mission speakers I got from a charity shop. I chose a different power rig though with a 2200mah 3 cell lipo battery and a simple balance charger. This way I can run it off the mains too as the charger uses the balance lead of the battery whilst the amp draws from the main battery plug. Works great :-)
Your battery plan sounds good! Just remember that lipo cells don't like going below 3v, so some kind of cut-off or alarm is recommended. Something you probably know already, but one never knows.
+DIY Perks Good stuff, thanks. In relation to the battery voltage issue, can you think of a way of raising the cut off voltage of the amp from 8v to say 9v? That would be the icing on the cake me thinks....
I think no one notice that point on the video, I think you need to plug one 12V electric adaptor into the batteries cable. Also, I think if you don't want to use the batteries you can use a 12V regular electric connector, like those used for some electronic devices. The price of those connectors it's around 4 dollars used and you can find those in any Salvation Army Store, Second-hand store, or Flea Market.
Just in case you are thinking to buy the AC adapter here's one link to buy one new at Amazon www.amazon.com/Kastar-Adapter-5-52-5mm-Wireless-Security/dp/B003TUMDWG/ref=pd_bxgy_img_2/133-6300212-5135165?_encoding=UTF8&pd_rd_i=B003TUMDWG&pd_rd_r=bf0ed31a-0fd8-4788-8bb0-23eac5fc5802&pd_rd_w=Yl1g8&pd_rd_wg=5vhCv&pf_rd_p=4e3f7fc3-00c8-46a6-a4db-8457e6319578&pf_rd_r=ZHHJQ5HTC6RNZTRHD9SE&psc=1&refRID=ZHHJQ5HTC6RNZTRHD9SE
+Tobias Sommer all you do is get the dc charging port and wrap it with the wires same as the connector. easier to understand im saying you get a male and female dc end and connect them to the ends of the battery pack.
+tracy tillett Interesting idea! So, I get dc power plug and dc socket, both with wire cable on them? How do I connect them to the battery case wires? Should I use a lithium battery charging module for 18650's?
yeah they make pretty much every type of battery pack pretty much and most lilely it will come with a male dc connector to draw power, so all you need to do is get a female connecter cut the wire and put the two together. very simple. i found this out by taking apart a rechargeable dc battery pack
I know, I am late to the party, but would you kindly give us an estimate as how long this will last on your average volume with the battery pack? Thank you!
@@Randy2747 Probably at least 4 hours at high volume and thats a low rough estimate. I use to use a 200 watt (4x50watt) D-class amp that would use a single 12v 7AH battery at max volume for around 2-3 hours. hes suing 15v, 1.5AH (another estimate as it depends on the battery). So 5 times less battery capacity than what I used, but also 7 times less power output.
To take the most power and running time out of it you can take up to 18 Ni-xx (xx is shortcut for both Ni-Cd or Ni-MH) cells. Fresh out of charger these are at the absolute maximum to 25 volts at 100% charge level. So let's make a calculation: I expect, that the amplifier will have 35 to 40 watt maximum output power. Hint: It CAN deliver up to 50 watts but there's only coming bkkrrrrkzzrrr out of speakers... :D So let's say 35 watts of really useable "harmonic" power without big distortion. The type AA Ni-xx cells are available from 500 to 1200 mAh - Ni.Cd or from 700 to 2800 mAh - Ni.MH. For extended runtime of course you can use type C cells - they are available up to 5000 mAh (real capacity! not fake 8000000000000000 mAh). But maybe you have to modify the project as the type C cells are much fatter than type AA cells. Then there are the D cells too... That's the bigfoot under all cells :D but that's not topic... b2t... If you take some well known brand cells type AA, let's say eneloops, they have about 2300 mAh each cell. And they are Low Self Discharge too (LSD). You take 18 x 2300 mAh cells equals 21.6 volts NOMINAL ! voltage Hint: with 4600 mAh type C cells you can double the runtime. 21.6 volts x 2.3 Ah equals 49.7 Wh - means you can take about: 40 watts for an hour long. 49.7 watts about 50 minutes. Or when you power up the amp to 3/4 of its maximum, you should have a runtime of about (30 watts / 49.7 watthours capacity) 90 minutes. Or at room volume (let's say 5 to 10 watts) about 10 to 5 hours. Bluetooth power consumption is so less that I won't calculate it... It would last for weeks when only bluetooth is on. sorry for the long text. If you have questions, feel free to ask. :)
Almost all the amps in eBay say 50w+50w when the data sheet of the TDA7492P says 25w+25w, but the data sheet don't say anything about using 4ohm speakers, just 8ohms would this be the reason?
I was looking for this info too but couldn't find it. I just realised my speakers are 4 ohm and not 8. Would adding a 4 ohm resistor fix my problem? My drivers are rated at 25w each.
I wouldn't do that, you will need a 25w resistor in line at full to dissipate the remaining power. Try just to keep the volume down. Or maybe find some 4 ohm tweeters (most of the cheap ones are 4 ohms) that work with that power and add them in series with each speaker that would make an 8ish ohm load too
Hey @Diyperks quick question, the board you used in the video clearly has a line in jack for audio, but the board that you linked us to does not. Would you know where I would find the board that also has that line in jack? Oh yes, and also, how hot does the board get, and should I use it with a heatsink?
+javalin597 Ah never mind, I found it. To anyone who is wondering, you can find the board that has the line in in addition to the blutetooth here, it's only a dollar more: ebay.com/itm/TDA7492P-50W-50W-Wireless-Bluetooth-4-0-Audio-Receiver-Digital-Amplifier-Board/111692298369?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33278%26meid%3Ddb81ed6e5c0446baaa0eebbe88dede93%26pid%3D100005%26rk%3D1%26rkt%3D6%26mehot%3Dpp%26sd%3D271883054265
Adnan Mlivo Because those are very very dangerous to work with. His goal was to make a super easy, fast amplifier. With those li-po batteries, soldering or wiring is not an option for all ages. Double A batteries are more convenient and easy to apply.
+Adnan Mlivo im using a Bosch 18V 3Ah Lithium-Ion which workes just fine :) the batterys im using have an LED Indicator for Charging Status... my Fast Charging Charger ( x) ) charges them in about 1 1/2 hours one of them last about 1-2 days at 50% volume ... so if your good at crafting just build a plug for ur Drill Battery and use it if it has 12 up to 24V since those Batterys are made for High Current to drive those Drill Motors you dont have to worry about burning them out... just check for the charging status maybe use some Voltage Meter so you dont get them too low on Voltage and Damage them :) have a good one :)
+Paximaz First ... you dont charge a AMP or a Speaker... charging the battery does the trick... im using a regular Bosch Fast Charger... how should i use the Power Input from the AMP to Charge the Battery which is powering the AMP ? xD you know theres the battery -> which powers the -> AMP and the "external" charger -> to charge the -> battery... i have 3 3Ah Bosch 18V Li-Ion Batterys so if one is down i switch them and charge the empty one (with the Original Bosch Charger) ... like i wrote before ive build a plug to connect the Power Input of The Amp to one of my Bosch 18V Li-Ion Battery... and since it lasts some days ... not only 1-2 Days like i wrote before... its not even bothering me that i have to switch them because it takes seconds to unplug one and plug the other one in...
18650 would be great if they werent so expensive. for this amp, you could get away with just a few 18650's and it would have a much longer playtime. although they are around 10€ each
Yeah mine lasts hella long used 8 9800mAh battery’s at 3.7v each. I used it for 4 hours at a bit over half volume, which was still really loud, and it had hardly used any of the battery’s capacity.
I know this is late, but I think he uses this: www.ebay.com/itm/350714569990?rmvSB=true He linked this charger in another project build he had here: ruclips.net/video/9aLzfjZu1DY/видео.html
I actually have one of those little bluetooth amplifier boards that a friend GAVE me! I need to find a set of speakers like you have because those sound fantastic! Love the bass on them!
Lost Evesy Well, you don't need tannoys specifically. I'm sure there are some old bookshelf speakers in your local second hand store for not much money. Old speakers can still sound great you know.
Did it. the kit was $14 USD on Aliexpress with a clear case. The button extenders in the kit were useless, I'll just use phone controls. I found an old laptop charger brick that puts out 18v to power it. Great sound.
@@ivanminchev888 not late for me as i was wondering about it too.. i didn't miss what he said tho.. but the question remains.. where do you plug the jack to?
@@ivanminchev888 the batteries are wired to the connector that he uses to power the amp.. i guess that you can make a charger with the same connecter and plug the batteries (the battery pack) to it to charge.. but that's not shown in the video..
He knows how to solder, he just didn't do it here, perhaps because he wants to show that you can do this things with just twisting wires and insulating tape.
Thanks mate, my fault for not looking down a little bit in the comments and seeing that this has been asked before. Thanks for replying so quickly though
+DIY Perks where do the plus and minus poles have to go? is minus the inner one and plus the outer one or the other way around? i'm pretty afraid to damage that amp at it's first use ^^
+DIY Perks where do the plus and minus poles have to go? is minus the inner one and plus the outer one or the other way around? i'm pretty afraid to damage that amp at it's first use ^^
MrErozionn I would assume this is a class S och T and 50W, i don´t know if its RMS or not, but if it is RMS, and you use god quality AA batteries they will give, 3Wh per battery, so that is about 30Wh, so that is about 35 minutes at full blast. But that is only if the song use the power full out, and most don´t. So you would probably get a bout a hour or so out on full blast.
MrErozionn As an extension to the last comment, I would recommend not using AA batteries but instead using 18650 battery cells as three of them will provide more capacity than the 10AAs used here, but they can also safely push more power. Even use three 18650's in parallel, and use three of those in series to get over 3x the capacity.
MrErozionn Typicall brand new fully charged AA battery has capacity of 1.5v @ 2500mah. Connected in series hence, capacity will remain same but voltage of 8 cells will add up to 12v, suitable for the amp. The datasheet of TDA7492p can deliver 25w on each channel, total 50 watts max. If you play music @ full volume. you will get around 30 odd minutes .half that and your up-to an hour.and so on. Note: Its safe @ half volume for AA batteries since you will not be discharging the batteries very fast.
MrErozionn Depends on how loud the volume is. The amp itself is VERY efficient (hence why it doesn't need a heatsink) and at normal listening levels should easily last at lest 8-10 hours.
What it looks of it a 12V@5A or something like that. If you want to load the batteries via a cable really need a limiter of 1A or preferably 0.5A and also a timer so they dont ever heat.
Screamin' Lord Byron i was thinking exactly the same thing? Why make them portable with a battery pack and then restrict them with wires? That bluetooth amp also looked damned ugly and fragile stuck on the side like that. If the speaker is of an infinate baffle design why not mount all that gubbins inside the enclosure with a permanently soldered and fitted Lithuim Ion battery pack and external charge socket. It would then only be a case of ruggedising the outside of the speaker enclosure and would have a fully armoured and ultra portable rave warrior field rig.
How neat I ordered that 3 years ago and built it out to place in my 1992 v12 jag convertible... so i could play my tunes from my phone back then... I just hooked it up to 2 minimus 7s (woodgrain of course...) great sound with the top down at 70mph
u sound silly. charging any batteries with just wires is a very dull move. you need a battery charger that goes into your wall and is rated for similar battery type.
Anel Redzic that would be correct. It did sound like he was suggesting you could just throw voltage to the pack and charge it, which would work, but it would also likely reduce battery life. And could get dangerous if for some reason too much voltage starts going to any of the batteries. Proper battery charging gets kind of complicated depending on battery chemistry. If I was to do this, I'd use lithium ion batteries, you could get away with 4 16850's and chargers aren't too bad in price.
Use a power supply and simply connect your power jack to it. Positive to positive, set power supply voltage close to maximum recommended pack voltage (just multiply single cell voltage by number of cells), set max current to around 1/5 of maximum capacity (2500mAh battery pack should be charged at around 500mA, for example) and that's it. It should take around 5-6 hours to fully charge. If you're not very confident in it, just monitor your batteries if they are not getting too warm for first few charges.
wait... you wanna recharge this whole bunch of batteries with a simple power plug? no actual charging circuit with any balancing or monitoring? recipe for disaster :|
Some battery charger stations ( RAYtronic C8 for example ) have option to set how many Ampere hour( mAh ), Voltage( V ) and Electricity( A ) the battery have ... If you set on charger to charge only 100mAh -1000mAh -10 000 mAh with standard 1.5V, 3V, 6V, 9V, 12V etc Voltage and Electricity( A ) ... it's charge only to that point . When it is full ( reached the limit what you set. ) the charger stop charging.... so you don't need a monitoring circuit :) ( you can set how fast the station charge that batteries too ... 0-100-200 mA ) I have the same style charging in my RC Tank ( plug directly connected to the battery ). ( Keep that in mind ... You can do it only if those batteries are similar .... you can't combine 2-3-4 types of batteries )
You can probably build in a charging circuit using a 5V 4A power supply. You'll need to have protection and balance circuits on your cells to stop them from unevenly charging because the cells themselves all have different internal resistances, so some cells will draw more power than others which can result in an overcharge. This is the reason why those self-balancing scooters had a knack of exploding is because they didn't have power balancing and protection on the cells, so some overcharged and exploded while others ran totally flat.
A speaker will only go as loud as the coils and magnet size allows it... Watts have nothing to do with how loud it is.. It's the decibels... Having a small speaker and big Amp only makes the speaker disorted before it blows its coils... My terminology isn't correct... But people who know this understand exactly what I'm talking about
you are right, but watts and ohms have to play a part as well, they cant be left with "oh power doesnt equal loudness". Try giving a speaker thats used in concerts 5w, lets see how loud it is 😂
Just picked this exact amp board up. Pretty sweet for the price. Plenty loud, the Bluetooth works better than my expensive Sony amp receiver. I think that audio sounds so clear here partially because of the clean power source. I used a 19 volt laptop power supply, there's a slight hum I have to keep gain and volume down a bit, I'll try other power supplies too. Wonder if you can bridge the channels on this. I bought this amp with an included little acrylic case for $20, using a nice pair of bookshelve speaker to listen to music while I brew beer.
@@TheNetworkingGuy the amp amplifies the electrical signal, watts is a unit of electricity, it is not a unit of sound, that would be db, the speaker turns the electrical signal into sound and heat, an inefficient speaker will produce more heat than sound, an efficient speaker will produce more sound with the same unit of electricity, whilst it is true that more watts pumped into the same speaker will produce more sound, a speaker with an efficiency of say 89db/1w/1m compared to a speaker 99db/1w/1m will be twice as loud given the same unit of electricity, so how loud a system is largely depends on the quality of the speaker attached to the amp, as not everybody will be connecting a set of tannoys to this amp resuts will vary quite a lot
@@TheNetworkingGuy and just a note to add, an increase of 10db its twice as loud, if you double the power put into a speaker you get an increace of approx 3db so from this you can see the speaker is much more important than the amp
@@oldskoolhead0 Your totally an utterly wrong the AMP is 100% responsible for the volume, from an electrical engineering perspective and from personal experience, i had a record player with a crappy preamp, plugged in the speakers, background music volume at max on the turntable, plugged into a 25watt per channel AMP (Rotel RA-921) and i can't even turn the speakers up more than 1/2 with annoying everyone else in the neighbourhood. And from an electrical engineering point of view an amplifiers entire job is to increase the magnitude of the signal. if you figure out the current gain and the voltage gain and you multiply them together you get the gain in power which is how an amp is rated, the speaker then has the more power to actually create sound, the efficiency of the speaker will change how high it can go but the amp has to enable it to get there in the first place.
@@gabrielcaddy9850 no the amp is responsible for the amplitude of the signal, what of that signal comes out as volume is up to the speaker to convert to sound, the efficiency of a speaker is denoted in the specs as efficiency or sensitivity xxxdb/1w/1m which translates to, if you put a 1w signal into it it will produce xxxdb measured at 1 meter away, xxxdb is apparent volume of sound measured in decabells aka volume, to get a 3db rise in volume you have to double the power, to get an apparent doubleing in volume you need a 10db rise, so you would have to double the power more than 3 times for the volume to sound twice as loud, so you double 1w you get 2, you double 2w you get 4w you double 4w you get 8w so you have put 8x the amount of power into the speaker and you are still not quite hearing a doubling of volume as that gives a 9db rise not 10, its a logrythmic scale, so if you have 2 speakers 1 with 89db/1w/1m and 1 with 99db/1w/1m (which are not unrealistic figures) the latter is already twice as loud with the same 1w signal and you would have to put 8w into the former just to match it, these are facts you can go research yourself, which you can see my comment is 100% accurate, your anecdotal evidence is meaningless
@@TheJaapnlThink it depends on what type of batteries he uses. if use some 18630 3000mah batteries, could last you all day at max power. If only he integrated a way to change out the batteries without pulling the whole supply apart. the 18630 batteries are rated at 3.7V, and would be cool if the dc input could charge them as well. Just my thoughts. I know this reply is old, but I am looking for something powerful enough to power a sub and speakers together
@@TheJaapnl you're very welcome! At least that's what I would do. No AA for me wouldn't last too long imo. Wouldn't be hard to build either. Looks like they would fit right into that battery pack of his too
Some peeps have suggested that the live tests have been faked because (I presume) it sounds so 'clean'. This isn't the case - it really IS all live audio. There are two reasons it sounds so 'clean', the first being that the recordings were done outside, where there is minimal echo. This is particularly noticeable in the field test, which is to be expected as it's a field - there really is nothing for the sound to bounce off.
The second reason it's so clean is that all the live audio was captured with TWO Rode NT1-A studio mics in an ORTF stereo config (carried by someone off camera). This config was chosen because I needed the high SPL capability to avoid distortion. These mics are also cardioid mics, which means they reject off-axis sounds (like echos) which also contributed to the 'clean' sound.
Hope this helps to clarify things! :)
+DIY Perks do you know of a amplifier version with a sort of audio remote, I would like to build something like this for my tv in my den. I know this has a audio in , but my tv is weird where once audio is outputted it decides the amplifier of the speakers is in charge of volume control. thanks for help.
The amp came in the mail two days ago! Works great! I just used an ac power adapter to power it for now and used an altoids can to hold it, for now haha. It's really cool.
+ThePackapunchmaster How many Amps was the power adapter? I want to use a power adapter with mine, but I am afraid ill burn it up with too many amps.
+hyperman717 As far as i am aware electronics don't mind what amps come out of the adapter, its more the voltage. The specs say this amp can do 8-24v and the device will use the amps it needs, so long as you don't plug it to a 120v 15a wall outlet and stay within 8-24v dc you will be fine lol. Just find a 8-24v ac to dc power supply you got lying around, should power it assuming it has enough of a max amperage output. but if your dc power supply doesn't have sufficient amps it might not power on, or it wont preform optimally. examples of some ac to dc power supply's are, old laptop power adapters, phone charger bricks, the xbox360/one power brick. if you want to find out its output look on the sticker you should see something like this.
AC in 160v-240v ~ 50/60hz
DC OUT 5v === 500mA
+DIY Perks Just got mine in the mail today. Super happy with it, and it sounds great! Gonna try using it for a portable-speaker-backpack project Im working on. Thanks for jet a brilliant video. Keep up the good work. :)
Did anyone else notice that the garden looks great? :D
DIY Garden :D
Exquisite gardening. Yes sir, first rate indeed!
yes
First thing I noticed!!
Yes great garden
This is two years late saying as I just have watched the video, but I can confirm that he isn't lying about the audio. Having watched his portable mic build before this I know he has the audio gear to record at a level that is going to be higher quality then what most peoples headsets and or speakers can reproduce, an added bonus to my claim is I have recreated this genius device and tested it, and it really does work. Keep up the amazing work +DIY Perks
how much power does your recreation consume? (in watts)
I've watched this like 20 times purely because of the inspiration. Voice over is 10/10 and video tutorial 10/10.
glade you got something out of it cause it was a total time and money waste for me
@@thesonie, what went wrong?
@@thesonie actually also curious what happend, was just about to build that thing as an upgrade for my own pair of speakers.
@@thesonie what happened
@@BenCos2018 it simply wasn’t able to run any small speakers.
You and Great Scott Make the best homemade tools, gadgets, and do dads. Seriously.
Agreed. The videos are very pleasant on the eye. And the products you finish up with are professional looking.
totally agree. We need to get these two together
Important difference: Great Scott explains WHY he doing so. No background details in this video. That's a MAJOR difference.
Point of relevance: No one was comparing the two. One is a designer, the other is an engineer. BOTH are great at what they do.
@@tgirard123 yeah lmk how that goes.
Nice garden.
nice everything.
@@tennicktenstyl nice.
Bartosz Olszewski nice 69 oikes
@@phizlip nice spelling.
Agree
This guy is like a British KipKay..
Kipkay minus the sponsors every 3 gosh dang seconds and total rip off of other people. I applaud you for making truly original designs, especially for sun light.
Will Bicks Well said, the quality of the DIY Perks videos completely blow Kipkay out of the water.
Ripmax To be fair, in this video we just take a ready-to-use amplifier and make a neat little housing for it....
MrTrollicus I know it's a simple project, but the quality of the video is outstanding, the lighting, the audio and the b roll footage is pretty damn neat for a solo video producer.
Ripmax That's for sure
Found out about this amplifier thanks to you.
I used acrylic glass and a nice copper plate as a logo instead of the aluminium, and I'm powering it via a universal laptop charger.
Used it for my wedding first and now it's got a permanent place in the garage workshop!
I absolutely love it, thank you for sharing this.
Just finished my build. thinking of putting the whole thing in a travel suitcase with wheels to make it more portable. Great video!
you should post a video of your results on ure channel. i would love it if you pointed out some of the details missed in this vid. ive seen comments about the BT pairing noise being at full volume and that it can damage your speaker setup. any issues there?
Now it's even cheaper! Amazon US link: amzn.to/2LQtK0c
DIY Perks thanks
u r awesome
DIY Perks but how would you feed the power to the amp
Hey, can you tell me if i can recycle my old hometheatre passive speakers (2x 6ohm towers +2x 4ohm subwoofer) with a car amplifier fed by a computer PSU?. Let's assume the wattage output, impedance and power supply do meet the required specifications, do i have to take care of something else? (The speakers and subwoofers have the +/- spring cables on the back).
DIY Perks how would you go about adding a separate volume control to the circuit?
I want to turn it down independent to the Bluetooth/phone volume as the lowest settings is too loud.
Thanks
nothing fake about this.
this is the amplifier that I was hoping to replace with one that somebody said how to "make" but this is a premade store-bought amplifier not a home made amp.
it's a neat project.
and a nice way to mobilize an amp and a nice way to enclose an amp.
What I love about you guys are that you provide tricks and easy ways out in case the tools necessary aren't available.
Funny I'm watching this 7 yrs later and the quality of your work has improved immeasurably. It's insane how smaller and probably better you could make this now. Please please do pdf parts lists with all your projects please. Oh any chance of doing a triple monitor display to act with a tablet or computer?
Finally, a youtube video where the narrator says "aluminium".
Because he's British. Aluminum is correct as well
Finally the first person to say it right
@@sakurafurukawa183 Both pronunciations are correct.
Haha theres 69 likes
Me Flea you said aluminum wrong
I like that you used the same song that off the ranch uses in the beginning of his videos.
Trading in my sun - Michael Flory
I built this the year this video came out. As a direct response to the popularity of this video, chinese ebayers started making custom boxes that came with the Amp made out of Acrylic and an all in one 10 battery tray. This meant all you had to buy besides that one purchase was some velcro strips to adhere it to the speakers. All in all it cost be about £25, including the 10 rechargeable Amazon basic's batteries. I could play music at a very decent volume for 7hrs or so off of one charge. I've used it for many BBQ's, what a great build this is.
outstanding video once again. Your production quality is really top notch. Well done
ajaywilson Cheers :)
DIY Perks You should try doing one video a week! I find myself endlessly waiting for your videos, they make my day!
With no heatsink attached, I highly doubt that amplifier chip is actually rated at 50 watts RMS per channel... maybe 50 watts maximum (peak) for both channels combined, which would probably come out to about 10 to 15 watts RMS per channel. However, with efficient speakers, that's still plenty of power for it to get very loud!
+Vishalkrishna Tr A 10% Total Harmonic Distortion is terrible for any Hi Fidelity (or even mainstream) audio experience, considering that even 1% is too much to begin with; but I guess that for a backyard party DIY project for the non-electronic engineers or hobbyists this might do.
Just look up D-amps or T-amps. They are freakin efficient. 96+% sort of efficient. No trouble putting out these wattages. To filter it to acceptable THD levels is quite a challenge tough. But not unsurmountable. T-amps are a proof.
+NGC1433 Up to 10W THD below 0.1% and only goes over 0.25 after 20W where it rises sharply. These modern chips are magic. They were not cheating with specs at all.
vwestlife Also thought that so went and checked it out. The seller says 50W+50W but it's the little P on the end that makes the difference. The TDA7492 has 50+50 RMS but this one is 25+25 RMS. Yes, it's at 10% specs but the 20W @ 0,25% is more than enought to get a pretty loud sound for a small party :) My doubt is the battery life. Dont think they would last for long at full power...
The battery-life is easy to get:
10 AA with 1.5 V each => 15 Volts.
Continues power ~ 30 W total (easier number). So you are drawing 2 Amps.
And good batteries are at around 2 mAh.
So 1h with rather high volume would seem possible.
And the sound-quality is good too, with < 1% for most of its range is far better than what typical loudspeakers produce, so not noticeable.
"The valve rectified, transformer coupled, single ended pure Class-A 211 amp and 64' folded horn driver combo is the must have party / picnic system for the young hipster this summer"
This is where my diy Bluetooth all started thanks guv
mhmmmm gotta love that 60fps
JesterBe3 Yeah, people seem to think that 30fps vs 60fps isn't noticeable. :( It's sad.
DIY Perks Troll eyesight only see's up to 30fps. Thank the lord I am human and can enjoy this 144hz monitor. :)
You're my Tony Stark!! you're awesome!!
Hey DIYPerks!
I just got my final parts today so i could build it myself, and god damn it sounds INSANE!! Can't believe the sound is really THAT clear and it's alot better in stereo!
hey dude! could you take a quick guess on how long it lasts?
Can't really say dude. I've bought 10 cheap AA batteries and it has been playing non stop for 2 hours in one session and it still hasn't run dry! But you can hook it up to a car battery since it can supply 12v/24v and the board supports that, so you can probably make it play all day long! ;-)
What do u use to charge the 12v batteries in series?? I've got the batteries but dont know how to charge in the better way.
id get a cheap small solar panel. thats what my friend uses to charge the car battery on his little electric boat
how would you wire it?
It's really hard to be impressed by something on the internet these days... but you sir!! you blew my away!!
Your DIYs are off the charts cool!
Keep it up man!!
we missed u man !!
I’m surprised to find that you watch Off The Ranch! I thought I had clicked the wrong video when I heard that theme!
I ordered one and i have to say, it's a really nice little board. One thing to be aware of, they don't seem to have a power button and auxiliary jack anymore. At least mine doesn't.
no power button? do you need to take out the battery to shut it of? or how does it turn on?
+Bryan Peeters Pull the power plug out of the board
Bryan Peeters you'd have to cut the power to the board. Either by pulling the little plug, removing a battery or installing a switch between the battery and the board.
There is a power botton. Really small though
No power button on mine but I do believe it has a aux
I tried this and holy moomoo!!....its pretty loud!!....the live sound audio was definitely not fake!!
Pal you are an inspiration , creative and actually talented youtuber, the type to go on and do great things, haters get pitty still commenting ignorance 10 years down the line... Keeps up the productions and tutorials,,,, well apreciated
I saw this and recognized the amp right away, love that board, i have it run my desk setup and my old car that was missing a radio. I use lipo connectors so i can move it around with me.
When played loud those batteries will run out very quickly. My guess would be less than half an hour. Because of the higher voltage it will play louder when Alkaline batteries are used instead of rechargeable ones. My advice would be to use four or five good quality Li-Ion 18650 rechargeable batteries* in series, but still the playing time will not be very long.
Since those speakers aren't really portable you can use a notebook power supply (15-21 Volts) instead of batteries and run them from the mains.
* to be safe, use protected Li-Ion batteries from a trusted source (so NOT China).
Its posible? how may ion bateires? or which laptop batery? thnks!
The main board is from China
@@pingping9780 but the amp itself won't blow your face off if it malfunctions. a faulty battery will
That was my thought about the batterys I'm just curious to what the batterys are actually doing bc it's not powering the speaker, is it just powering that amplifier then? And since they arnt portable is there a way to hard wire this things so I can plug in to a wall or a surge so nothing gets screwed up?
nice project! this is powerful for such a small price. TIP : @3:18 Never clean your drilled holes with your finger you can cut yourself really bad.
I would have used a Li-ion battery pack with a boost converter. Li-ion batteries simply have more capacity.
Maybe 5 years ago they weren't as cheap as they are now.
@@ro63rto how many ions bateries need? for the same power? tnks!
Favio Lopez the batteries you’ll use will say the voltage and amps on it.
Hi can i get help.
I would like to set a portable bluetooth speaker with same but 25w+25w speaker.
C
Please help me to choose the speaker..
Which one should I go for ??
I need a louder and crisp combination
Dangit, I just built something like this (although, more of a boom box style) with the same amp but no bluetooth fro $15. Oh well, at least mine has a UPS battery powering it with about 3 -5 days of battery life.
Getting the controls would be difficult though, as I made the cabinet for all analog controls, and the main control panel is full, and the rest of the case is 3/4" maple.
***** 3-5days! holy cow!!
Freddie Lo
Yeah, it's a pretty big battery. 12AH
+LazerLord10 used to see mAH
+LazerLord10 is your battery an AGM battery? When you charge it do you need ventilation so that it vents hydrogen?
1:08 I had to lower the volume of my laptop speakers...
🤣🤣🤣🤣
Huge love from INDIA my friend 🇮🇳🇮🇳🇮🇳🇮🇳
Cloud: *releases 1 drop of rain*
Exposed Circuit Board: "WHAT KIND OF SORCERY IF THIS"
just use tape for waterproofing :)
@@owlon225 or make metal cover.
@Thebrightestbrick88 Thats the problem
What I think when watching your videos "I'll do one of these one day". Still haven't xD
Debated Nothing This one is a great place to start though - very easy to build and requires minimal tools, but awesome results!
This is awesome I will make these!
did you
? didnt work for me
Well it’s been 4 years ?
Protected 18650's, insulated or at least covered board to top it all a protected charger as well. Those speakers are awesome for sure.
Tabla Lover what about 26650’s 4200mah 🤔 I will go with those for longer time of use 🤷🏽♂️
@@ireviewit2510 i full on agree.
Most common question in the comments section: "How long will the batteries last?"
Audio amplifiers don't have a constant consumption rate. Also the volume level affects the battery life. And lastly, another reason why this question cannot be answered directly is that, the capacity of the batteries that you use will affect the battery life.
Wow this thing puts to shame all those ludicrously over priced bluetooth speakers floating around. I mean sure this is a little bulkier but if you want a bluetooth speaker for a work site or something this is fine and 10x louder.
30m radius isn’t that many people anymore...
It ended now so yippie
This guy narrates excellently.
Think using a 6× 18650 would also be awesome as well as durning transients aka bass would be able to do much better
I hade the same idea.
26650’s 💪🏽
Had the same idea, would have to remove batteries for charging.
yes but you must have individual cell protection! Li- xx cells are very sensitive to overcharge and over-discharge. (2.9 volt to 4.1 volt exactly -/+ 0.1 or even less volt tolerance only.
Thumbs up this is going straight to the pool room.
this thing is perfect. just what i need. i only have one question. how long can you listen on 1 full pack of 10 batterys
i want know it too :) ..... plz DIY Perks
I run it off 10 AA rechargeables and it lasts for about 2 days straight from a full charge (say if you forget to turn it off). If you only turn it on for a couple hours each day (which I do) it has lasted me up to 2 weeks of stereo fun! Hope my reply helps!
thank you ^^
+OSCAR CAMPO keep in mind having it on for 2 days consumes likes no power compared to have it blasting music full power for 2 days straight. It probably won't last long doing that.
Yeah, you're probably right. But, in my experience, even having at full blast I've gotten at least a whole day of play time out of it. It's incredible how long it can play for in my opinion. Thanks for the comment.
I always hoped for a life like him. So charming so intelligent so helpful so smart and most importantly a very good Samaritan ....praises are nothing in front of him.
you could put the 2 speakers together and replace the batterys with 1 12v battery
and put all the components in both of them.
Yup, that is exactly what i am doing :D
Is it sport.. 12v dc?
eww bro gotta have my bass
RIP Neighbours
Can you use a 4x18650 battery pack
Doing this should mean a shorter amp design, you will just need to have a charging circuit which is easy to find on ebay
IIGrayfoxII especially when battery packs like these could be found from bike lights :D
.
IIGrayfoxII of course you can. ITS DIY! Use whatever you like, that you think will work! Most likely it will! :D
IIGrayfoxII yes
I'm planning on doing this build but instead of the batteries used here, I have decided to opt for 6 X 3.7V lithium polymer 18650 batteries adding to a total of 22.2V. I have decided to choose this option because I will be able to set the gain mode to a higher decibel level, plus I will hook up the battery packs using deans connectors, so I can easily plug those into my smart charger. I just want to know.. Is there any particular reason I shouldn't go with lithium ion batteries, or at such a high voltage? Thanks for your time.
Wow winterfells garden looks awesome.
Would you be able to recommend a WiFi amp instead? That could be handy for having a multiroom speaker setup :)
Also, I'd love to know what that track was you used to demonstrate the rig.
I've put mine together now and it sounds great on a pair of Mission speakers I got from a charity shop. I chose a different power rig though with a 2200mah 3 cell lipo battery and a simple balance charger. This way I can run it off the mains too as the charger uses the balance lead of the battery whilst the amp draws from the main battery plug. Works great :-)
Your battery plan sounds good! Just remember that lipo cells don't like going below 3v, so some kind of cut-off or alarm is recommended. Something you probably know already, but one never knows.
+DIY Perks True. But what was the name of the tune you played please?!
"Hooky with Sloane" from RUclips's audio library I believe.
+DIY Perks Good stuff, thanks.
In relation to the battery voltage issue, can you think of a way of raising the cut off voltage of the amp from 8v to say 9v? That would be the icing on the cake me thinks....
+Fra Zuppi Hi there. Yes, there are lipo batter allarms readily available. Just type 'lipo battery alarm' into ebay or Amazon and there they are!!
And I just wasted money buying a bluetooth speaker :( But hey I'm still going to build this.
yeaaaaaa
Forget the speakers, I love that beautiful garden!
Superb!!! How to charge the battries? How long do they last.
I think no one notice that point on the video, I think you need to plug one 12V electric adaptor into the batteries cable. Also, I think if you don't want to use the batteries you can use a 12V regular electric connector, like those used for some electronic devices. The price of those connectors it's around 4 dollars used and you can find those in any Salvation Army Store, Second-hand store, or Flea Market.
Just in case you are thinking to buy the AC adapter here's one link to buy one new at Amazon
www.amazon.com/Kastar-Adapter-5-52-5mm-Wireless-Security/dp/B003TUMDWG/ref=pd_bxgy_img_2/133-6300212-5135165?_encoding=UTF8&pd_rd_i=B003TUMDWG&pd_rd_r=bf0ed31a-0fd8-4788-8bb0-23eac5fc5802&pd_rd_w=Yl1g8&pd_rd_wg=5vhCv&pf_rd_p=4e3f7fc3-00c8-46a6-a4db-8457e6319578&pf_rd_r=ZHHJQ5HTC6RNZTRHD9SE&psc=1&refRID=ZHHJQ5HTC6RNZTRHD9SE
can you make a Video for the Charger and how to charge it?
+Tobias Sommer all you do is get the dc charging port and wrap it with the wires same as the connector. easier to understand im saying you get a male and female dc end and connect them to the ends of the battery pack.
+tracy tillett Interesting idea! So, I get dc power plug and dc socket, both with wire cable on them? How do I connect them to the battery case wires? Should I use a lithium battery charging module for 18650's?
yeah they make pretty much every type of battery pack pretty much and most lilely it will come with a male dc connector to draw power, so all you need to do is get a female connecter cut the wire and put the two together. very simple. i found this out by taking apart a rechargeable
dc battery pack
tracy tillett
I know, I am late to the party, but would you kindly give us an estimate as how long this will last on your average volume with the battery pack? Thank you!
It's dependent on capacity of the batteries. And current draw
@@casper2501 right... So how Long did his batteries last while doing testing and playing with it?
@@Randy2747 Probably at least 4 hours at high volume and thats a low rough estimate. I use to use a 200 watt (4x50watt) D-class amp that would use a single 12v 7AH battery at max volume for around 2-3 hours. hes suing 15v, 1.5AH (another estimate as it depends on the battery). So 5 times less battery capacity than what I used, but also 7 times less power output.
To take the most power and running time out of it you can take up to 18 Ni-xx (xx is shortcut for both Ni-Cd or Ni-MH) cells. Fresh out of charger these are at the absolute maximum to 25 volts at 100% charge level. So let's make a calculation:
I expect, that the amplifier will have 35 to 40 watt maximum output power. Hint: It CAN deliver up to 50 watts but there's only coming bkkrrrrkzzrrr out of speakers... :D So let's say 35 watts of really useable "harmonic" power without big distortion.
The type AA Ni-xx cells are available from 500 to 1200 mAh - Ni.Cd or from 700 to 2800 mAh - Ni.MH.
For extended runtime of course you can use type C cells - they are available up to 5000 mAh (real capacity! not fake 8000000000000000 mAh). But maybe you have to modify the project as the type C cells are much fatter than type AA cells. Then there are the D cells too... That's the bigfoot under all cells :D but that's not topic... b2t...
If you take some well known brand cells type AA, let's say eneloops, they have about 2300 mAh each cell. And they are Low Self Discharge too (LSD).
You take 18 x 2300 mAh cells equals 21.6 volts NOMINAL ! voltage
Hint: with 4600 mAh type C cells you can double the runtime.
21.6 volts x 2.3 Ah equals 49.7 Wh - means you can take about:
40 watts for an hour long.
49.7 watts about 50 minutes.
Or when you power up the amp to 3/4 of its maximum, you should have a runtime of about (30 watts / 49.7 watthours capacity) 90 minutes.
Or at room volume (let's say 5 to 10 watts) about 10 to 5 hours.
Bluetooth power consumption is so less that I won't calculate it... It would last for weeks when only bluetooth is on.
sorry for the long text. If you have questions, feel free to ask. :)
@@casper2501 Oh, what a revolutionary thought °o°
the button extender is such a good idea!
Almost all the amps in eBay say 50w+50w when the data sheet of the TDA7492P says 25w+25w, but the data sheet don't say anything about using 4ohm speakers, just 8ohms would this be the reason?
Yup, that's the reason. At 4ohm it's 50w, 8ohm 25w.
Thanks so much I've looking for this answer everywhere! Also the ones with an AUX are aux in or out? Awesome channel btw!
I was looking for this info too but couldn't find it. I just realised my speakers are 4 ohm and not 8. Would adding a 4 ohm resistor fix my problem? My drivers are rated at 25w each.
I wouldn't do that, you will need a 25w resistor in line at full to dissipate the remaining power. Try just to keep the volume down. Or maybe find some 4 ohm tweeters (most of the cheap ones are 4 ohms) that work with that power and add them in series with each speaker that would make an 8ish ohm load too
4,6,8,16 ohm are compatible but 8 is optimal according to the specs :)
It’s nice to watch somebody who can pronounce aluminium properly...
You could improve it by using 18650 cells and a voltage booster
18650's are a very VERY bad idea for this...
1, 18650s put out over 30 amps, and 2, you dont need a voltage booster for 18650's...
@@carsareepic20 then use a step-down module?
@@carsareepic20 My point is to make this rechargable via USB
@@chrxzzyy37 no!!!! you dont charge 18650's with usb, please, just stop, you dont know what your talking about
now that's how it's done! Tim Taylor would be proud.
Uh so I'm running one of these on 12v and it doesn't go nearly as loud as in the video. Am I doing something wrong?
Is it 3A?
@@LNekko determined that my speakers were only 20w.
Hey @Diyperks quick question, the board you used in the video clearly has a line in jack for audio, but the board that you linked us to does not. Would you know where I would find the board that also has that line in jack?
Oh yes, and also, how hot does the board get, and should I use it with a heatsink?
+javalin597 Ah never mind, I found it. To anyone who is wondering, you can find the board that has the line in in addition to the blutetooth here, it's only a dollar more: ebay.com/itm/TDA7492P-50W-50W-Wireless-Bluetooth-4-0-Audio-Receiver-Digital-Amplifier-Board/111692298369?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33278%26meid%3Ddb81ed6e5c0446baaa0eebbe88dede93%26pid%3D100005%26rk%3D1%26rkt%3D6%26mehot%3Dpp%26sd%3D271883054265
+javalin597 Good find. Now I hope I can hook it up directly to a 12V output.
+iamarawn Might be late, but you definitely can.
@@javalin597 thank you
I was looking for this just now lol
why didn t u use lithium ion batteries or li po or some 18650
Adnan Mlivo
Because those are very very dangerous to work with.
His goal was to make a super easy, fast amplifier.
With those li-po batteries, soldering or wiring is not an option for all ages.
Double A batteries are more convenient and easy to apply.
+Adnan Mlivo im using a Bosch 18V 3Ah Lithium-Ion which workes just fine :) the batterys im using have an LED Indicator for Charging Status... my Fast Charging Charger ( x) ) charges them in about 1 1/2 hours one of them last about 1-2 days at 50% volume ... so if your good at crafting just build a plug for ur Drill Battery and use it if it has 12 up to 24V since those Batterys are made for High Current to drive those Drill Motors you dont have to worry about burning them out... just check for the charging status maybe use some Voltage Meter so you dont get them too low on Voltage and Damage them :) have a good one :)
Max Mustermann how do you go about charging the amp/speakers? Does the power input on the amp charge them?
+Paximaz First ... you dont charge a AMP or a Speaker... charging the battery does the trick...
im using a regular Bosch Fast Charger... how should i use the Power Input from the AMP to Charge the Battery which is powering the AMP ? xD you know theres the battery -> which powers the -> AMP and the "external" charger -> to charge the -> battery... i have 3 3Ah Bosch 18V Li-Ion Batterys so if one is down i switch them and charge the empty one (with the Original Bosch Charger) ... like i wrote before ive build a plug to connect the Power Input of The Amp to one of my Bosch 18V Li-Ion Battery... and since it lasts some days ... not only 1-2 Days like i wrote before... its not even bothering me that i have to switch them because it takes seconds to unplug one and plug the other one in...
18650 would be great if they werent so expensive. for this amp, you could get away with just a few 18650's and it would have a much longer playtime. although they are around 10€ each
Incredible ..... your brain and your ideas are the maximum
HOW DO YOU CHARGE THE BATERYS
nice video
We're still very much interested in battery time.. Moderate constant playing, how long before dead?
i know you prbably dont care anymore but roughly 2 days straight booming music
Hazus how do you know?
Yeah mine lasts hella long used 8 9800mAh battery’s at 3.7v each. I used it for 4 hours at a bit over half volume, which was still really loud, and it had hardly used any of the battery’s capacity.
how would you charge the batteries ? do i have to open it every time ? and how long do they last between charges
+Anouar Moussaoui buy a female 2mm jack and a male one wire those to together and plug in a 12v supply
I know this is late, but I think he uses this:
www.ebay.com/itm/350714569990?rmvSB=true
He linked this charger in another project build he had here:
ruclips.net/video/9aLzfjZu1DY/видео.html
Simple. Just remove the 8 screws and use a dedicated 18650 charger to charge. We all still know how to use a screw driver I think.
T & B IOWA yes a 18650 charger for nimh cells great idea
I actually have one of those little bluetooth amplifier boards that a friend GAVE me! I need to find a set of speakers like you have because those sound fantastic! Love the bass on them!
Where can i get 2 tannoy speakers for next to nothing ?
Lost Evesy Well, you don't need tannoys specifically. I'm sure there are some old bookshelf speakers in your local second hand store for not much money. Old speakers can still sound great you know.
Lost Evesy You can score tannoys pretty cheap on ebay. However, if you want a real budget gem, look out for some mission 732
0:49 offtheranch
Rons random channel was trying to remember where I knew that from
im not sure about how you are to recharge the batteries...
Or you can substitute 10 AA batteries for 4 18650 lithium ion cells and 4 cell lithium ion charging circuit.
you don't
Did it. the kit was $14 USD on Aliexpress with a clear case. The button extenders in the kit were useless, I'll just use phone controls. I found an old laptop charger brick that puts out 18v to power it. Great sound.
DIY Perks how can i charge the batteries without having to remove them?
6:05 a little late but...
@@ivanminchev888 not late for me as i was wondering about it too.. i didn't miss what he said tho.. but the question remains.. where do you plug the jack to?
@@SubcultureUnlimited 7:03 I dont know what am output terminal is but why did he put batteries when he is wiring It up
DIY Perks I need a little help please
@@ivanminchev888 the batteries are wired to the connector that he uses to power the amp.. i guess that you can make a charger with the same connecter and plug the batteries (the battery pack) to it to charge.. but that's not shown in the video..
Pls start soldering properly and use some shrinking tube.
He knows how to solder, he just didn't do it here, perhaps because he wants to show that you can do this things with just twisting wires and insulating tape.
is there any way to hook this up to standard power (uk 13 amp, 240 volt wall socket) maybe with a dc converter?
Any laptop adapter should do.
Thanks mate, my fault for not looking down a little bit in the comments and seeing that this has been asked before. Thanks for replying so quickly though
+DIY Perks where do the plus and minus poles have to go? is minus the inner one and plus the outer one or the other way around? i'm pretty afraid to damage that amp at it's first use ^^
+DIY Perks where do the plus and minus poles have to go? is minus the inner one and plus the outer one or the other way around? i'm pretty afraid to damage that amp at it's first use ^^
The centre should be positive, and the outer negative.
After careful consideration, this is the best DIY channel I've seen, ever. This guy is the new *and improved* Kipkay.
What brand/model are those speakers?
Tannoy f1 bookshelf speakers
How long will the batteries last?
MrErozionn I would assume this is a class S och T and 50W, i don´t know if its RMS or not, but if it is RMS, and you use god quality AA batteries they will give, 3Wh per battery, so that is about 30Wh, so that is about 35 minutes at full blast. But that is only if the song use the power full out, and most don´t. So you would probably get a bout a hour or so out on full blast.
MrErozionn As an extension to the last comment, I would recommend not using AA batteries but instead using 18650 battery cells as three of them will provide more capacity than the 10AAs used here, but they can also safely push more power. Even use three 18650's in parallel, and use three of those in series to get over 3x the capacity.
MrErozionn Typicall brand new fully charged AA battery has capacity of 1.5v @ 2500mah. Connected in series hence, capacity will remain same but voltage of 8 cells will add up to 12v, suitable for the amp. The datasheet of TDA7492p can deliver 25w on each channel, total 50 watts max. If you play music @ full volume. you will get around 30 odd minutes .half that and your up-to an hour.and so on. Note: Its safe @ half volume for AA batteries since you will not be discharging the batteries very fast.
MrErozionn Depends on how loud the volume is. The amp itself is VERY efficient (hence why it doesn't need a heatsink) and at normal listening levels should easily last at lest 8-10 hours.
What it looks of it a 12V@5A or something like that. If you want to load the batteries via a cable really need a limiter of 1A or preferably 0.5A and also a timer so they dont ever heat.
Why not just mod the speakers with the chip and batteries. Then just two speakers .. no cables.. no need to make the dodgy kit case lol
Screamin' Lord Byron i was thinking exactly the same thing? Why make them portable with a battery pack and then restrict them with wires? That bluetooth amp also looked damned ugly and fragile stuck on the side like that. If the speaker is of an infinate baffle design why not mount all that gubbins inside the enclosure with a permanently soldered and fitted Lithuim Ion battery pack and external charge socket. It would then only be a case of ruggedising the outside of the speaker enclosure and would have a fully armoured and ultra portable rave warrior field rig.
How neat
I ordered that 3 years ago and built it out to place in my 1992 v12 jag convertible... so i could play my tunes from my phone back then...
I just hooked it up to 2 minimus 7s (woodgrain of course...) great sound with the top down at 70mph
So how exactly would you charge these batteries using the jack?
u sound silly. charging any batteries with just wires is a very dull move. you need a battery charger that goes into your wall and is rated for similar battery type.
But how to recharge them, I need to take them out everytime i need to recharge them?
Anel Redzic that would be correct. It did sound like he was suggesting you could just throw voltage to the pack and charge it, which would work, but it would also likely reduce battery life. And could get dangerous if for some reason too much voltage starts going to any of the batteries. Proper battery charging gets kind of complicated depending on battery chemistry. If I was to do this, I'd use lithium ion batteries, you could get away with 4 16850's and chargers aren't too bad in price.
or u can use a power supply plan on making the speaker not for mobile so you can use it by plugging to the power wall
Use a power supply and simply connect your power jack to it. Positive to positive, set power supply voltage close to maximum recommended pack voltage (just multiply single cell voltage by number of cells), set max current to around 1/5 of maximum capacity (2500mAh battery pack should be charged at around 500mA, for example) and that's it. It should take around 5-6 hours to fully charge. If you're not very confident in it, just monitor your batteries if they are not getting too warm for first few charges.
what song at 0:48
***** Darude - Sadstorm
Speedyjens Old - Joke.
Jordan O'C Better late than never
***** Do you know what it's called though?
Speedyjens No, it really isn't.
wait... you wanna recharge this whole bunch of batteries with a simple power plug? no actual charging circuit with any balancing or monitoring?
recipe for disaster :|
How would you charge it through the power plug I made one for myself and I can’t think of anything to plug it into to charge it
Some battery charger stations ( RAYtronic C8 for example ) have option to set how many Ampere hour( mAh ), Voltage( V ) and Electricity( A ) the battery have ... If you set on charger to charge only 100mAh -1000mAh -10 000 mAh with standard 1.5V, 3V, 6V, 9V, 12V etc Voltage and Electricity( A ) ... it's charge only to that point . When it is full ( reached the limit what you set. ) the charger stop charging.... so you don't need a monitoring circuit :) ( you can set how fast the station charge that batteries too ... 0-100-200 mA ) I have the same style charging in my RC Tank ( plug directly connected to the battery ). ( Keep that in mind ... You can do it only if those batteries are similar .... you can't combine 2-3-4 types of batteries )
Wow that stereo mic works great!
Battery life??
Depends on the battery brand
How do you charge the batteries on the unit?
take the batteries out... and charge them :D
i want to know it also how do you charge the batteries?
You can probably build in a charging circuit using a 5V 4A power supply. You'll need to have protection and balance circuits on your cells to stop them from unevenly charging because the cells themselves all have different internal resistances, so some cells will draw more power than others which can result in an overcharge. This is the reason why those self-balancing scooters had a knack of exploding is because they didn't have power balancing and protection on the cells, so some overcharged and exploded while others ran totally flat.
Why not use a powerbank?
Just use another battery instead.
Anyone knows the name of the song he used on the speakers ?
Scrolled down and found this: Hooky with Sloane ;)
Ordered the bluetooth amp right away, going to use it on some of my unused speakers! Great video, great idea!
How'd it turn out?
Realizing this is an older video, however wondering if this could be done with a USB-C power bank instead of batteries and a voltage controller?
Definitely! Would work best with a power bank capable of delivering 20V / 60W - the kinds sold for charging ultra portable laptops.
A speaker will only go as loud as the coils and magnet size allows it... Watts have nothing to do with how loud it is.. It's the decibels... Having a small speaker and big Amp only makes the speaker disorted before it blows its coils... My terminology isn't correct... But people who know this understand exactly what I'm talking about
I dot know the correct terminology but that’s more or less exactly what I was thinking
you are right, but watts and ohms have to play a part as well, they cant be left with "oh power doesnt equal loudness". Try giving a speaker thats used in concerts 5w, lets see how loud it is 😂
What's the song being played?
+MSI2k Hooky with Sloane
+MSI2k darude sandstorm
+MSI2k Hooky with Sloane. NOT darude.
+Elizabeth McCarter ; nice to know... great sounds, and the guy is great to follow!
+Elizabeth McCarter ; nice to know... great sounds, and the guy is great to follow!
Just picked this exact amp board up. Pretty sweet for the price. Plenty loud, the Bluetooth works better than my expensive Sony amp receiver. I think that audio sounds so clear here partially because of the clean power source. I used a 19 volt laptop power supply, there's a slight hum I have to keep gain and volume down a bit, I'll try other power supplies too. Wonder if you can bridge the channels on this. I bought this amp with an included little acrylic case for $20, using a nice pair of bookshelve speaker to listen to music while I brew beer.
how is the song called?
Idk you might have to get your phone out to call it yourself and see?
UnEvenEdits lol
Hopefully the number is toll-free.
Tim J Sarcasm and late reply aside, the song is named "Hooky with Sloane".
From Scrapyard Waaaaaaars! :D
how loud it is has little to do with the amp and more to do with the efficiency of the speakers
It has more to do with the amp than the speakers...your amp AMPLIFIES the signal this making it louder
@@TheNetworkingGuy the amp amplifies the electrical signal, watts is a unit of electricity, it is not a unit of sound, that would be db, the speaker turns the electrical signal into sound and heat, an inefficient speaker will produce more heat than sound, an efficient speaker will produce more sound with the same unit of electricity, whilst it is true that more watts pumped into the same speaker will produce more sound, a speaker with an efficiency of say 89db/1w/1m compared to a speaker 99db/1w/1m will be twice as loud given the same unit of electricity, so how loud a system is largely depends on the quality of the speaker attached to the amp, as not everybody will be connecting a set of tannoys to this amp resuts will vary quite a lot
@@TheNetworkingGuy and just a note to add, an increase of 10db its twice as loud, if you double the power put into a speaker you get an increace of approx 3db so from this you can see the speaker is much more important than the amp
@@oldskoolhead0 Your totally an utterly wrong the AMP is 100% responsible for the volume, from an electrical engineering perspective and from personal experience, i had a record player with a crappy preamp, plugged in the speakers, background music volume at max on the turntable, plugged into a 25watt per channel AMP (Rotel RA-921) and i can't even turn the speakers up more than 1/2 with annoying everyone else in the neighbourhood. And from an electrical engineering point of view an amplifiers entire job is to increase the magnitude of the signal. if you figure out the current gain and the voltage gain and you multiply them together you get the gain in power which is how an amp is rated, the speaker then has the more power to actually create sound, the efficiency of the speaker will change how high it can go but the amp has to enable it to get there in the first place.
@@gabrielcaddy9850 no the amp is responsible for the amplitude of the signal, what of that signal comes out as volume is up to the speaker to convert to sound, the efficiency of a speaker is denoted in the specs as efficiency or sensitivity xxxdb/1w/1m which translates to, if you put a 1w signal into it it will produce xxxdb measured at 1 meter away, xxxdb is apparent volume of sound measured in decabells aka volume, to get a 3db rise in volume you have to double the power, to get an apparent doubleing in volume you need a 10db rise, so you would have to double the power more than 3 times for the volume to sound twice as loud, so you double 1w you get 2, you double 2w you get 4w you double 4w you get 8w so you have put 8x the amount of power into the speaker and you are still not quite hearing a doubling of volume as that gives a 9db rise not 10, its a logrythmic scale, so if you have 2 speakers 1 with 89db/1w/1m and 1 with 99db/1w/1m (which are not unrealistic figures) the latter is already twice as loud with the same 1w signal and you would have to put 8w into the former just to match it, these are facts you can go research yourself, which you can see my comment is 100% accurate, your anecdotal evidence is meaningless
how long will it last?
+jaap nl +DIY Perks
@@TheJaapnlThink it depends on what type of batteries he uses. if use some 18630 3000mah batteries, could last you all day at max power. If only he integrated a way to change out the batteries without pulling the whole supply apart. the 18630 batteries are rated at 3.7V, and would be cool if the dc input could charge them as well. Just my thoughts. I know this reply is old, but I am looking for something powerful enough to power a sub and speakers together
@@VinnieVega76 wow didnt think someone would ever reply to this thank you
@@TheJaapnl you're very welcome! At least that's what I would do. No AA for me wouldn't last too long imo. Wouldn't be hard to build either. Looks like they would fit right into that battery pack of his too
A genuinely talented content producer with actual ideas to share. Brilliant!